26 ASPIDITJM. 



ences above of size, growth, and colour, 

 the frond is more equable, the pinnulets 

 more running to a point, less convex, thin- 

 ner, more bristled, more angular, not 

 smooth on their surface, but furrowed and 

 ridged with lines of the midrib, &c. ; not 

 soft, but rigid, and not so much separating 

 into secondary pinnse. Scales on the 

 stem simple, obtuse, of a yellowish uni- 

 form brown. May. Deciduous. Common. 

 Easy of cultivation, though not taking 

 quite so freely as Dilatatum. Elegant. A 

 larger form is found, rising to 3 feet. Dark 

 green. Flatter, bigger, broader, coarser, 

 and less delicately toothed and scored. 



THELYPTERIS. (Marsh Shield-Fern.} 



Fig. 2. From 6 to 16 inches. Yellowish 

 green. The root disposed to creep to the 

 surface in dry situations. Fronds springing 

 up here and there in masses therefrom; 

 rather erect, though fragile, slight, and 

 shrivelling together on being gathered; 

 when under trees, stooping forward to the 

 light. Pinnae mostly alternate. Pinnulets 

 simple, oblong, smooth on the sides, very 

 thin, inclining to pointed, and having a 

 sharp angular appearance, as if cut, from 

 being a trifle rolled backward on the edge. 

 The inferior next the main stem projecting 

 in front, so as to form a raised line all 



